Recorder



R. S. KAMPF RECORDER Nov. 2 7, 1962 1'7 Sheets-Sheet 1 Filed Sept. 8, 1958 FIG.

Jil/[lh Illl INVENTOR. RICHARD S. KAMPF 34% A/2M ATTOR N EY.

Novl 27, 1962 R. s. KAMPF 3,066,299

' RECORDER Filed Sept. 8, 1958 17 Sheets-Sheet 2 FIG. 2

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1 NTOR. 96 RICHARD S. KAMPF Y ATTORNEY.

Nov. 27, 1962 R. s. KAMPF 3,066,299

RECORDER Filed sept. a, 1958 17 Sheets-Sheet :5

INVENTOR. RICHARD S. KAMPF ATTORN EY.

R. S. KAMPF Nov. 27, 1962 RECORDER 1'7 Sheets-Sheet 4 Filed Sept. 8, 1958 INVENTOR. RICHARD S. KAMPF ATTORNEY.

R. S. KAMPF Nov. 27, 1962 RECORDER 17 Sheets-Sheet 5 Filed Sept. 8, 1958 FIG. 8

Nov. 27, 1,962 R. s. KAMPF 3,066,299

REcoRDE INVENTOR. RICHARD S. KAMPF ATTOR NEY.

RQ S. KAMPF Nov. 27, 1962 RECORDER 17 Sheets-Sheet 7 Filed Sept. 8, 1958 FIG. IO

FIG.

FIG. I2

INVENTOR. RICHARD S. KAMPF Bf/ 4MM ATTORNEY.

Nov. 27, 1962 R. s. KAMPF 3,066,299

RECORDER Filed Sept. 8, 1958 17 Sheets-Sheet 8 FIG. I3

INVENTOR. RICHARD S. KAM PFl R. S. KAMPF Nov. 27, 1962 RECORDER 17 Sheets-Sheet 9 Filed Sept 8, 1958 FIG.

FIG. I7

INVENTOR. RICHARD s. KAMPF 3% ATTORNEY,

R. S. KAMPF Nov. 27, 1962 RECORDER 17 Sheets-Sheet 10 Filed Sept. 8, 1958 wml.-

INVENTOR. RICHARD S. KAMPF ATTORNEY ATTORNEY.

R. S. KAMPF RECORDER F l G. |9A

GRIDLINE RELAY l2 LAMP ON SWITCH INDIC. SWITCH OUT OF PA PER 31.6 BR. CL.

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INVENTOR, RICHARD S. KAMPF 22 SPEED SWITCH ATTORNEY.

R. S. KAMPF RECORDER 17 Sheets-Sheet 13 F-led Sept. 8, 1958 FIG. 20A

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Filed Sept. 8, 1958 FIG. 2O

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INVENTOR. RICHARD S. KAMPF ATTOR N EY.

R. S. KAMPF Nov. 27, 1962 RECORDER 17 Sheets-Sheet 1'7 Filed Sept. 8, 1958 FIG. 22

4 |23456789m Hm F l G. 23

GALvANoMi-:TER

SERxS GALVO INPUT RECEPTABLE 4Jl-'4J2 SHUNT INVENTOR. RICHARD S. KAMPF ATTO R N EY.

`or incandescent light.

nite Sttes atent O 3,066,299 RECORDER i Richard S. Kampf, Denver, Colo., assigner to Minneapolis-Honeywell Regulator Company, Minneapolis, Mum., a corporation of Delaware Filed Sept. 8, 1958, Ser. No. 759,675 Z1 Ciairns. (Cl. 346-109) This invention relates to a method of and apparatus for producing a record in the form of an image or trace which is immediately visible and usable and is accomplished in full view of the operator by means of a beam of radiant energy which is caused to form in a spot upon a sensitized paper.

This invention represents an improvement upon the invention disclosed in the following applications for U.S. patents: Serial No. 631,078, tiled December 28, 1956, by Robert A. Le Masseria and Richard S. Kampf; Serial No. 638,729, led February 7, 1957, by John P. Mahoney, Ir., and Richard S. Kampf; and an application filed on or about August 11, 1958, by Robert A. Le Massena for a patent on an improvement in recorders, Serial No. 754,234.

It is an object of this invention to provide an oscillograph and a process of recording in which sensitized recording paper may be run in forward or reverse direction, with or without recording in a forward direction and without recording in a backward direction, for latensiication or data reduction.

Latensication (latent image intensification) means the emergence of a latent image upon exposure to fluorescent This makes possible inspection and analysis of a record within a few seconds after it has been made.

It is a further object of this invention to provide an oscillograph and a recording process in which the chart lines may be recorded simultaneously while the galvanometer image or traces are being made to provide accurate reference lines for amplitude and time calibration. 'Ihe grid lines (parallel to paper movement) and the time lines (vertical to paper movement) are made from sources of light separate from the source from which the galvanometer image or traces are made. This simultaneous recording insures that the record is always accurate even if the paper should shift lightly during recording or is susceptible to dimensional changes due to changing ambient conditions.

It is a further object of this invention to provide an oscillograph and a recording process having an optical 4system including a source of radiant energy preferably having a wave length in the ultra-violet band, a plurality of active galvanometers (which may be thirty-six in number or more), and a sensitized paper driven at a constant speed by an electric motor and adapted to receive the spot of radiant energy from the galvanometer to produce an image or trace thereon.

The intensity of this spot of this radiant energy may be controlled by a filter. Each "trace may be marked by means of a trace identifier which interrupts Athe beam of radiant energy.

It is still another object of this invention to provide an oscillograph which may be operated manually, automatically, remotely, or in multiplex.

A better understanding of the present invention may be had from the following detailed description when read in connection with the accompanying drawings in which:

FIG. 1 is a perspective view of the front of the oscillograph showing the operating panel.

FIG. 2 is an elevation of the left hand side of the front case assembly.

FIG. 3 is anelevation of the `front of the front case assembly.

3,066,299 Patented Nov. 27, 1962 FIG. 4 is an elevation of the right hand side of the front case assembly.

FIG. 5 is an elevation of a portion of the right hand side of the front case assembly with the case removed.

FIG. 6 is an elevation taken at 45 to the vertical on line 6 6 of FIG. 2.

FIG. 7 is a diagram of the electric motor-to-paper drive.

FIG. 8 is a front elevation of the electric motor-to-paper drive.

FIG. 9 is a perspective view showing the supply spool and the take up spool for the paper.

FIG. l0 is a diagrammatic or schematic View in vertical cross section of the oscillograph.

FIG. 1l is a top or plan view (taken at a slight angle to the horizontal) showing the light source.

FIG. 12 is a diagrammatic or schematic front elevation of the record number counter as shown in FIG. 10.

FIG. 13 is a diagrammatic or schematic view in ver tical cross section showing the means for making the time lines.

FIG. 14 is a substantially horizontal view showing a portion of the mechanism shown in FIG. 13.

FIG. 15 is a left hand elevation of the light control center.

FIG. 16 is a substantially vertical cross section on line lr6- I6 of FIG. 15.

FIG. 17 is a perspective view of the light control center.

FIG. 18 is a block diagram showing the electric lamp which makes the time lines by ashing.

FIGS. 19, 19A, and 19B show the left and right halves of an electric circuit diagram of the wiring of this recorder without the power supply.

FIGS. 20, 20A, 20B, and 20C show the left and right halves of an electric circuit diagram of the wiring of the power supply of this recorder.

FIG. 21 is a schematic electric circuit diagram of the wiring of this recorder when connected for remote control.

FIG. 22 is an electric circuit diagram of the wiring for recording lamp.

FIG. 23 is an electric circuit diagram of the wiring for one of the galvanometers.

Referring now to FIG. 1 there is shown an operating panel which comprises the front of the oscillograph. Knurled wheel 1 provides for setting the length of the paper which lengths range from 0 to 25 feet. The control automatically resets at the end of each record in readiness for the succeeding records of the same length. FIG. 9 shows the knurled wheel 1 which actuates the stop switch 282. Y

A two-position switch 2 actuates the auto record length footage control and provides for either automatic or mane ual stopping of the paper drive. In the automatic position, the recorder stops automatically after running the paper length preset on the autorecord length footage control. Automatic record length may be obtained for either recording or non-recording operations. In the manual position, manual operation of the paper drive switches starts and stops the recorder.

Indicator 3 is an electric lamp which glows green when the auto-manual record length switch is set in auto position. v

Meter 4 shows the length of paper remaining on the supply spool.

Counter 5 indicates the next number to be photograpncd, -along with an adjacent event-marker arrow and instrument serial number, on the paper. When the recording switch 2l is closed at the beginning of each automatic or manual run the record being made on the paper is numbered provided a record number switch (not shown) on the power input panel on the rear of 'the oscillograph 'i Indicator 6 Vis Yan electricity to recording lamp 101.

is in the internal position. When the record number switch is in the external position, operation of the recording switch 21 will not produce a number on the record. Through appropriate connections (not shown) in the remote connector, however, the record number solenoid and flash tube may be operated independently or simultaneously.

This record numbering system is shown in greater detail in FIG. 12. A flash of light from the flash tube 1012 illuminates the record number appearing in the aperture in counter 5 along with the event-marker arrow land serial number of the oscillograph. These images are reflected by the record number mirror 1013 through the recorder number lens 1014 (in the record numbering box 58, FIG. 9) to focus on Y eIe'citric lamp which glows red giving a warning light when less than 25 feet of paper remain on the supply spool.

Rotary switch 7 provides for time lines on the paper `at intervals of 10, 1, V10, V100, or 176,000 seconds. Time lines are recorded vertical to the direction of movement `of the paper. Switch 7 may be turned to off position for no time lines or to external position for external signals. Time lines are recorded only when the recording switch .21 is closed. Each tenth line is accentuated except at 1()- second intervals.

FIGS. 13 and 14 show in greater detail the means for forming the time lines. These means comprise an electric flash tube 71 which produces two beams of radiant energy. These beams pass through the lenses 72 to the mirrors 73 which deflect the time lines onto the recording mirrors 74 and then through the recording lenses 75 to the paper 32 on the recording plane.

Power switch starts the cooling fans, lights the poweron indicator (comprised by an electric lamp 9 which glows green when the power switch 10 is closed), turns on the heaters in the magnet assemblies of the galvanometers, and supplies power to the rest of the oscillograph. This power is supplied from a commercially available source of electricity at 10S-125 volts, 60 cycles per second at approximately 9.0 amperes maximum.

Indicator 11 is an electric light which glows green when the lamp starting circuit turns on the recording lamp 101.

A two-position lamp switch 12 controls the supply of In closed position power is supplied to the lamp starting circuit. In off position, or in on position with the lamp not ignited, the paper drive may be operated by non-recording switch but not by recording switch 21.

Switch 14 is a two-position switch which, in closed position, supplies electricity to the grid line lamp 1010 l(FIG. 10). Indicator 13 is an electric lamp which glows green when the grid line lamp 1010 is turned on. Grid line lamp 1010 will normally be on when the grid line switch 14 is turned on, but is turned off whenever the nnon-recording switch 20 operates the paper drive. Lamp `1010 may be a fourteen watt, black light, iiuorescent, yelectric lamp. FIG. 3 shows an element 68 of the lamp assembly which has in it narrow slots 69 and slightly wider vslots 70 which occur every fifth slot and which facilitate evaluation. These slots 69 and 70 produce amplitude calibration reference lines or grid lines which extend longitudinally of the paper. In this manner the galvanometer spots can be positioned on or within the limits of any grid lines, calibrated in units of the phenomena to be measured, and the results read directly off the record in these same units. Because the grid lines and the images or traces are recorded simultaneously, there can be no inaccuracies as a result of shifting or shrinkage of the paper.

A two-position switch 16 operates paper drive motor 3B1 (FIG. 7) and indicator 15, which is an electric lamp which glows green whenever the paper drive motor SBI is energized. Switch 16 energizes the no record indicator A17 when switch 16 is open.

the paper Q2 on the recording plane...

The no record indicator 17 is an electric lamp which glows red under any of the following conditions:

A-Lamp switch 12 is in off position.

B-Lamp switch 12 is in on position but lamp is not in operation.

C-Paper supply exhausted.

D-Non-recording switch 20 is controlling the paper drive.

E-Motor switch 16 is in off position.

A paper knife 19 is mounted so that it slides across the top of the upper, fixed platen 28 to cut off an individual record. Paper knife 19 is spring loaded to return automatically to its original position.

Non-recording switch 20 is of the three-position toggletype and provides 'for forward and VY'reverse motion'of the paper 32 without recording. Operation of -switch 20 in either momentary forward or momentary reverse position drives paper norm-ally but cuts off the recording spots of the galvanometers, the grid lines, and the time lines and will not operate the record numbering system.

Recording switch 21 is of the toggle-type and has three positions marked momentary, on, and off, which is the center position. For manual operation (when the automanual record length switch 2 is in manual position), the recorder will operate when the recording switch 21 is in either momentary or in on position. The record number is recorded and advanced every time the recording switch 21 is closed. For automatic operation (auto-manual record length switch 2 in auto position), the recording process is started with the recording switch 21 and stopped with auto record length control. The record number is recorded -and advances only when the recording switch 21 is operated at the beginning of an automatic run. The recording lamp 101 must be on for the recording switch 21 to be operative.

Push-button switches 22 select a setting which determines the factor by which any setting of the speed button 24 must be multiplied to give the actual paper speed in inches per second. These factors are 1/10, one, or ten for low, medium, or high speed range, respectively. Speeds are not accurate in reverse but vary with diameter supply spool. In reverse operation, range button 22, marked fora factor of ten, functions as a factor of one. Buttons 22 are interlocked to prevent simultaneous operation.

Release 23 releases the latch which holds the movable platen in up position behind the fixed platen. Pushbutton switches 24 select one of iive settings 1, 2, 4, 8, or 16 inches per second, which determine the particular paper speed for a `given speed range. Buttons 24 are interlocked to prevent simultaneous operation.

Platen handles 25 assist in sliding movable, lower platen 27 behind fixed, upper platen 28.

Latch handles 26 pull out and down for access to papertakeup spool in the take-up cradle during paper loading.

Lower, movable platen 27 and upper, fixed platen 28 provide a writing and viewing surface for the exposed record on the paper. Movable platen 27 slides up behind fixed platen 28 during paper loading. Supply cradle latch handle 29 pulls out and down for access to paper supply spool during loading.

Amber-colored viewing window 30 enables the operator to observe the spots made by the beam of radiant energy from the galvanometer mirrors during the positoning and recording operation.

Latensilier lamp 31 intensities the latent images on the length of paper exposed to the lamp. Lamp 31 is controlled by a starting switch and an on-oif switch (not shown). Latensifcation (latent image intensification) is the emergence of a latent image upon exposure to fluorescent or incandescent light. This permits inspection and an analysis of a record within a few seconds after recording.

A record is latensified by exposing it to white uorescent light. At vroom level intensity (about 50-foot andles) or higher intensity an invisible trace will become visible and readable in a few seconds. At low recording speeds (about 300 inches per second) this will occur in about ten seconds. At high recording speeds (about 10,000 inches per second) up to 30 seconds may elapse. If the record is to be kept in a note book or examined under illumination, further latensification is optional. However, further latensification is necessary if better trace contrast is desired.

For better trace contrast, the latensication time is determined by the contrast desired. Very good contrast is obtained by latensifying ten to thirty minutes at room level intensity. During latensication the background of the record becomes light-blue gray which reverts to light tan when latensification is completed. The oscillograph of this invention provides a most convenient means of latensication. The record may be run forward and backwards at low speed to achieve the desired latensication. Complete latensication produces a record with a blue trace on a light tan background. Humidity has little or no effect on latensiiied records. Latensied records are stable under average interior light conditions for many hours. They are permanently stable when stored in a file or desk drawer. Latensied records are not permanent in direct sun light.

Records maybe lixed for increased stability to light by treating the records for live to ten minutes in a solution such as that sold under the trademark Photo Flo prepared according to the manufacturers instructions. The records must be thoroughly dried.

For a disclosure of the means whereby the paper is driven from the supply spool to the take-up spool by means of an electric motor, reference is made to FIG- URES 2, 3, 4, 5, 7, 8 and 9. FIG. 7 is a schematic showing of the transmission from the drive motor to the drive roller. This transmission has five speeds in each of three ranges (fifteen steps). FlG. 7 contains a legend showing a gear on an over-running clutch, a gear on an electric clutch, a gear lixed to a shaft, and a gear free on a shaft. FIG. 7 also includes a table showing the range or multiplication factor of the transmission and the output speed in inches per second. This table also shows, under the heading Clutch, reference characters which designate which clutch is engaged in order to obtain the particular speed opposite this clutch reference character in the table.

Drive motor 3B1 has an output shaft 33 to which is secured a gear 34 meshing with a gear 35 fast on shaft 36. Gear 37 is fast on shaft 36 while the gears forming parts of clutches 3L1 and 3L2 may Ibe either connected to or disconnected from shaft 36.

Gear 37 meshes With gear 38 which is mounted on an overrunning clutch on shaft 39. The gear on clutch 3L1 meshes with gear 40 fast on shaft 39. The gear on clutch 3L2 meshes with the gear on clutch 3L3 which may be either connected to or disconnected from shaft 39. Gear 41 is fast on shaft 39 and meshes with gear 42 mounted on an over-running clutch on shaft 43 which has fastened to it gear 44 which also meshes with the gear of clutch 3L3.

Gear 44 also meshes with the gear of clutch 3L4 which also -meshes with gear 45 fast on shaft 46. Gear 47 is also fast on shaft 46 and meshes with the gear of clutch 3L5. The gear of clutch 3L5 also meshes with gear 48 which is free on shaft 46 and which also meshes with gear 49 mounted on an over-running clutch on shaft 50.

Gear 51 and the driving portion 56 of clutch 3LS are fast on shaft 50 as is gear 60.

Gear 51 meshes with gear 52 on pulley 3L7 which may be connected to or disconnected from shaft 53. A brake 3L6 may be connected to or disconnected from shaft 53 which also has pulley S4 fast to it. Pulley 54 drives belt 55 which is connected to the supply spool. Pulley 60 drives belt 61 and pulley 62 which is connected to the driving element of a drive clutch which may be connected to or disconnected from the drive roller 63.

The drive clutch is a Warner clutch. Clutch 3L8 is a Magtrol clutch. All the other clutches are Simplatrol clutches.

FlG. 9 shows a partial front case assembly with the covers removed. A takeaup cradle supports a takeup spool having a take-up spool sleeve 91 intermediate the ends thereof. A supply cradle 95 supports a. similar paper supply spool 93 on it. Belt S5 drives the paper supply spool 93. Belt 59 drives the paper take-up spool 92. Belt `61 drives the pulley of drive clutch which in turn drives drive roller 63. Gear 64 normally meshes with a gear on drive roller 63 to drive it.

The operation of the paper drive transmission is as follows. When the motor switch 16 (FIG. l) is in the ott position it supplies power to the no record indicator 17. When motor switch 16 is in the on position, the recording lamp must also Ibe on and the drive motor 3B1 starts. The chart speed push buttons 24 control the speed of the paper drive transmission. Selection of range buttons 22 and speed buttons 24 on the control Panel engage the proper combination of clutches for that speed.

Closing the recording switch 21 energizes appropriate relays to cause the record numbering ash tube circuit to photograph a number on the record. The two record number counters advance immediately to the next num- -ber in preparation for the following record. The record travels at the previously selected speed as long as the recording switch 21 is on or for the duration of the automatic run.

The non-recording switch 20 is identical to the recording switch 21 with the following exceptions: the record numbering circuit is not energized. In operation, in either direction the non-recording switch 2)` causes the intensity control to rotate to opaque position when the recording lamp 101 is on and turns olf the grid line lamp 1010. The non-recording switch 20, in addition to the above function, when in reverse position, energizes the proper clutches to cause the paper 32 to travel in the reverse direction. In the reverse operation, the paper speed is controllable by the push buttons 22 and 24 and is related to the diameter on the supply spool and is not constant. The no-record indicator 17 is lighted.

Paper tension is maintained during operation. The supply spindle brake 3L6 is energized with only sufficient current to maintain a constant braking drag on the supply roll 93. The take-up spindle clutch 3L8 is partially energized to maintain a constant paper tension. In reverse operation, the drive roller 63 is disengaged -by means of drive clutch and the take-up clutch is partially energized to provide a small braking drag. The reverse clutch 3L7 -is fully energized and driven at rewinding speed controlled by the push buttons 22 and 24.

An accelerate circuit momentarily increases voltage on take-up clutch 3L8 to provide the additional torque required to accelerate the take-up spool and maintain paper tension `during acceleration when: (l) the instrument is started at one of the higher speeds, or (2) a high speed button is pushed while the instrument is running at low speed. This same circuit decelerates the paper by applying full voltage momentarilv to the brake 3L6 when: (l) the instrument stops, or (2) a lower speed button is pushed while the instrument is running at high speed.

The optical system as shown in FIGS. 10 and ll :provides center galvanometer magnet bank performance for all three banks by `causing the incident light falling on the galvanometers from the light source to be normal to the line along which they are mounted. This allows the galvanometers to be positioned normally straight ahead, and therefore no non-linearities or unsymmetrical sensitivities are introduced as a result of the galvanometer coils having to be positioned with an initial rotation relative to the direction of the magnetic ux in the galvanometer `magnet banks. Uniform galvanometer 4illumination is accomplished by making the effective optical distance from the source to each magnet bank the same. 

